Permutation-lock



S. S. SWAN.

PERMUTATION LOCK.

APPLICATION FILED MAR. 6, 1920.

1,384,577. P t n y 12, 192

l l 1 v 3 F cfix raw 5 annual 5-5wan WM w UNITED STATES PATENT oFF c SAMUEL S. SWAN, OF EAU CLAIRE, WISCONSIN.

PERMUTATION-LOCK.

Application filed March 6,

T 0 all whom it may come-m:

Be it known that I, SAMUEL S. SWAN, a citizen of the United States, and resident of Eau Claire, in the county of Eau Claire and State of l/Visconsin, have invented certain new and useful Improvements in Permuta tion-Locks; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to new and useful improvements in permutation locks, and particularly in that type known as pad locks.

The primary object of the invention is to provide a device of this character which can be easily manipulated to unlock or look the same, but which will be very eflicient in use.

Another object of the invention is to provide a combination padlock, the permutation disks of which, with the exception of one, will remain in fixed position when the lock is open-so that the same may be easily and quickly relocked without the usual shifting of all of the disks.

A still further object is to provide a lock of this character which is primarily designed to be used to secure the spark and throttle lever and the steering wheel of an automobile against unauthorizedoperation.

Still another object of the invention is to provide a simply constructed permutation lock, the parts of which can be readily disassembled when the same is unlocked, but which will be securely retained against disassemblage when in locked position.

lVith these objects in view the invention resides in the novelfeatures of construction, combination and arrangement of parts which will be hereinafter more particularly described and claimed and shown in the drawing in which p r igure 1 represents an elevational view of a pad lock constructed in accordance with my invention, the parts thereof being in active or locked position.

Fig. 2 is a similar view with the parts in open position.

Fig. 3 is a longitudinal sectional view through the permutation portion of my de- Specification of Letters Patent; Pate t d J ly 19221 1920. Serial No. 363,789.

extended to provide a shank 2 on which the disposed. Obviously the parts to be secured by this look are located within the yoke of the shackle 1, they being held therein by means of a shackle plate or strap 3 which extends across the open end thereof. The construction of this strap 3 can be readily seen from Fig. 4, the same having a bearing opening at one end to rotatably and slidably receive the shank 2, whereas the opposite end has a hole 5 in which the short arm 1 p the other and upon the annular retaining flange 8, the bearing end of the strap 3 in turn resting upon the edge of the innermost peripheral flange 10. A cap nut 11 screwed on the threaded end 7 of the flange 6 retains all of these elements in assembled relation. Each of the tumbler disks 9 is provided with a notch 12'opening into the circular aperture which receives the shank 2 and the outer face of the peripheral flange 10 thereof carries a plurality of symbols such as the numbers 13. Furthermore the notch 12 of each tumbler disk coincides withone of the symbols on its peripheral flange. The bearing opening 4 of the strap 3 also has a notch 14 opening thereinto, while the sleeve 6 is provided with a longitudinally extending lock is in closed position with the parts'arranged as in Fig. 1, the lugs are located in the recesses formed between the several turnbler disks and between the outermost disk and the annular retaining flange 8. Thus if the notches 12 in the tumbler disks 9 are disoperating portions of the lock are slidably I rearranging the disks 9. For

a stop and alined,that is to say disposed out of alinement with the slot 15, the shank 2 is prevented from sliding through the sleeve 6.

WVhen, however, the tumbler disks are ma mpulated to register certain oi the numbers the shank 2,thus spacing the free end of the arm. 1 of the shackle from the strap 3. Consequently the strap 3 can be swung about the shank 2 as shown in Fig. 2 to thus disaline itsnotch 14; with the slot 15 of the sleeve 6. As a result of this the innermost locking lug 16 is retained in the recess of the cap 11 and inwardly of said strap, the other look ing lugs being positioned in the notches 12 of all of the tumbler disks 9 with the eX- ceptionof the outermost one. All of the tumbler disks with the exception of this outer oneare thus retained against rotation when the lock is open and the strap swung out of normal position.

Since the notches 12 of the several tumbler disks coincide with different numbers 18 on the symbol carrying flanges 10 thereof, various combinations may be formed by I instance when the parts are disassembled the disk 9 which isnow'theinnermost; disk may be substituted for the outermost disk, while the latter disk becomes the innermost disk. In disassembling the parts to carry out the rearrangement of'the combination, it'is merely necessary to unscrew the cap nut 11, aline all of the notches 12 and 14 with the slot 15 and then slide the sleeve from the shank 2.

It is impossible to remove the cap nut 11 when the cap is in closed position because of the engagement of a nut retaining pin 17 on thefshank 2 in a seat 18 provided. in the nut. In other words the pin 17' provides prevents unscrewing of" the nut ll-when the parts are in locked position as in Fig. 1.

From the foregoing description taken in the result that a lock of this type can be marketed at a comparatively slight cost.

Various changes may be made in the form and proportions of thedifferent parts of the lock to accommodate the same for use with other mechanisms than automobile controls,

without departing from the principles of the invention or sacrificing any of the ad.- vantages thereof. I'

I claim: I

1. A lock of the class described including a locking member having an arm, a tumbler disk carryingmember slidable on the arm, a pluralityof tumbler locking disks rotatableon the carrying member, said carrying memberbeing slidable .011 said arm when said disks are in unlocked position and held against sliding movement when said disks are in looking position, removable means for retaining the carrying member against sliding from the arm when the. disks are in unlocked position, and meansifor holding the last mentioned means against removal when said disks are in locking position. I

2. A look of the class described including a substantially pivoted on one of the arms of the shackle to swing into locking engagement with the other, and tumbler members slidable and rotatable on the first mentioned arm, said disks being slidable when in unlocked position and when the strap is in position to be 1' 90 moved into locking engagement with'said other arm, and held agalnst sliding movement when the same are in locked. position or when said strap is moved out of the'last- SAMUEL s. swAN.

U-shaped shackle, a 'strap 7 

